Question

solving mixture problems
the hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. forty - five copies of the book weigh a total of 249 ounces.
weight of books

	number of books	weight per book (ounces)	total weight (ounces)
paperback	$45 - h$	5	$x$
total	45		249

which value could replace $x$ in the table?
options: $5(45)-h$, $50 - h$, $5(45 - h)$, $40 - h$

Explanation:

Step1: Recall total weight formula

Total weight = number of books × weight per book.

Step2: Identify values for paperback

Number of paperback books is \( 45 - h \), weight per paperback is 5 ounces.

Step3: Calculate total weight for paperback

Using the formula, total weight \( x = 5\times(45 - h) \).

Answer:

\( 5(45 - h) \) (the third option)